Conductive winding structure and transformer having such conductive winding structure

Abstract

A transformer includes a circuit board, a conductive winding structure and a magnetic core assembly. The circuit board has a trace pattern of a primary winding coil and a first through-hole. The first segment has a first pin and a first hollow portion. The second segment has a first end coupled with the first segment, and a second end formed as a second pin and a second hollow portion. The second segment is folded toward the first segment with respect to a folding line such that the first hollow portion and the second hollow portion are aligned with each other to define a second through-hole. The magnetic core assembly is partially embedded into the first through-hole of the circuit board and the second through-hole of the conductive winding structure.

1 . A conductive winding structure for use in a transformer, the conductive winding structure comprising:
 a first segment having a first pin and a first hollow portion; and   a second segment having a first end coupled with the first segment, a second end formed as a second pin and a second hollow portion, wherein the second segment is folded toward the first segment with respect to a folding line such that the first hollow portion and the second hollow portion are aligned with each other to define a through-hole.   
   
   
       2 . The conductive winding structure according to  claim 1  wherein the conductive winding structure is a single and unbroken two-loop conductive piece made of metallic material. 
   
   
       3 . The conductive winding structure according to  claim 1  wherein each of the first segment and the second segment has a ring-shaped profile with a notch, and the first pin and the second pin are arranged on opposite sides of the connecting portion between the first segment and the second segment. 
   
   
       4 . The conductive winding structure according to  claim 1  wherein the first and the second segments are sheathed by an insulating layer, and the first and the second pins are unsheathed by the insulating layer. 
   
   
       5 . The conductive winding structure according to  claim 1  wherein the second segment is coupled with the first segment through an extension segment. 
   
   
       6 . The conductive winding structure according to  claim 5  wherein the extension segment includes at least one pair of half extension parts, which have the same profiles. 
   
   
       7 . The conductive winding structure according to  claim 6  wherein each of the first segment and the second segment has a ring-shaped profile with a notch, and the half extension parts of the extension segment have substantially the same semi-ring profiles. 
   
   
       8 . The conductive winding structure according to  claim 7  wherein each pair of the half extension parts of the extension segment are folded with each other to form a ring-shaped profile. 
   
   
       9 . The conductive winding structure according to  claim 8  wherein the conductive winding structure is an unbroken three-loop conductive piece. 
   
   
       10 . A transformer comprising:
 a circuit board having a trace pattern of a primary winding coil and a first through-hole;   a conductive winding structure including a first segment and a second segment, the first segment having a first pin and a first hollow portion, the second segment having a first end coupled with the first segment, a second end formed as a second pin and a second hollow portion, wherein the second segment is folded toward the first segment with respect to a folding line such that the first hollow portion and the second hollow portion are aligned with each other to define a second through-hole; and   a magnetic core assembly partially embedded into the first through-hole of the circuit board and the second through-hole of the conductive winding structure.   
   
   
       11 . The transformer according to  claim 10  wherein the circuit board further includes:
 multiple power contacts electrically connected to the primary winding coil;   a signal connection interface to be mounted on a system board; and   multiple signal contacts electrically connected to the signal connection interface.   
   
   
       12 . The transformer according to  claim 11  wherein the signal connection interface is an edge connector. 
   
   
       13 . The transformer according to  claim 11  wherein the circuit board further includes a protrusion, and the power contacts and the signal contacts are arranged on a terminal of the protrusion. 
   
   
       14 . The transformer according to  claim 10  wherein the conductive winding structure is a single and unbroken two-loop conductive piece made of metallic material. 
   
   
       15 . The transformer according to  claim 10  wherein each of the first segment and the second segment has a ring-shaped profile with a notch, and the first pin and the second pin are arranged on opposite sides of the connecting portion between the first segment and the second segment. 
   
   
       16 . The transformer according to  claim 10  wherein the first and the second segments are sheathed by an insulating layer, and the first and the second pins are unsheathed by the insulating layer. 
   
   
       17 . The transformer according to  claim 10  wherein the second segment is coupled with the first segment through an extension segment, and the extension segment includes at least one pair of half extension parts, which have the same profiles. 
   
   
       18 . The transformer according to  claim 17  wherein each of the first segment and the second segment has a ring-shaped profile with a notch, and the half extension parts of the extension segment have substantially the same semi-ring profiles. 
   
   
       19 . The transformer according to  claim 18  wherein each pair of the half extension parts of the extension segment are folded with each other to form a ring-shaped profile. 
   
   
       20 . The transformer according to  claim 19  wherein the conductive winding structure is a single and unbroken three-loop conductive piece made of metallic material.